Hallucinations

In his latest book, the neuroscientist Oliver Sacks writes about his own history using psychoactive drugs. He’s said that apart from being both pleasurable and dangerous, those experiences gave him empathy for his patients suffering from hallucinations. Sacks says hallucinations are far more common than we realize, and his book is filled with bizarre encounters with the unreal brought on by disease, syndromes and disorders. Doug talks to Oliver Sacks about the many and fascinating ways we perceive things that aren’t there. (Rebroadcast)